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Re: Who does source address validation? (was Re: what's that smel l?)
At 10:43 PM 09-10-02 -0700, Steve Francis wrote:
CAR should not be used to rate-limit but instead use the MQC police commandValdis.Kletnieks@vt.edu wrote:That's not terribly hard to overcome - allow icmp unreachables (from any source) in your acl, then deny all traffic from RFC 1918 addresses, then the rest of the ACL.My personal pet peeve is the opposite - we'll try to use pMTU, some provider along the way sees fit to run it through a tunnel, so the MTU there is 1460 instead of 1500 - and the chuckleheads number the tunnel endpoints out of 1918 space - so the 'ICMP Frag Needed' gets tossed at our border routers, because we do both ingress and egress filtering.
which basically does the same thing. CAR is not going to be around much longer and is not being developed anymore:
Have a look at:
for more information.